15913872 has 60 divisors (see below), whose sum is σ = 47968284. Its totient is φ = 4896000.

The previous prime is 15913841. The next prime is 15913951. The reversal of 15913872 is 27831951.

15913872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 14107536 = 1344^2 + 3756^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2379 + ... + 6122.

Almost surely, 2^15913872 is an apocalyptic number.

15913872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15913872 is an abundant number, since it is smaller than the sum of its proper divisors (32054412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15913872 is a wasteful number, since it uses less digits than its factorization.

15913872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528 (or 8519 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 15913872 is about 3989.2194725284. The cubic root of 15913872 is about 251.5312525801.

The spelling of 15913872 in words is "fifteen million, nine hundred thirteen thousand, eight hundred seventy-two".